Display device comprising a reflective sheet having a plurality of first and second light conversion dots respectively disposed around a plurality of first and second holes

ABSTRACT

A display apparatus includes a liquid crystal panel; a plurality of light sources configured to emit blue light; a reflective sheet including four edge portions and a center portion, wherein a plurality of holes are disposed on the reflective sheet, the plurality of holes includes a first hole and a second hole on each of the four edge portions of the reflective sheet, each of the four edge portions includes an edge of the reflective sheet, the first hole is disposed at a first distance from the edge of the reflective sheet, and the second hole is disposed at a second distance from the edge of the reflective sheet, wherein the second distance is greater than the first distance; and a plurality of light conversion dots.

CROSS-REFERENCE TO THE RELATED APPLICATIONS

This application is a Continuation of U.S. application Ser. No.17/418,664, filed Jun. 25, 2021, which is a national stage applicationof International Application No. PCT/KR2021/002835 filed on Mar. 8,2021, which claims priority from Korean Patent Application No.10-2021-0000892, filed on Jan. 5, 2021 and Korean Patent Application No.10-2021-0015416, filed on Feb. 3, 2021, in the Korean IntellectualProperty Office, the disclosures of which are incorporated herein byreference in their entireties.

BACKGROUND 1. Field

The present disclosure relates to a display apparatus and moreparticularly, to a display apparatus having a thin thickness, and alight source module thereof.

2. Description of Related Art

Generally, a display apparatus converts obtained or stored electricalinformation into visual information and displays the visual informationto a user. The display apparatus is used in various fields such as homeor workplace.

The display apparatus includes a monitor apparatus connected to apersonal computer or a server computer, a portable computer device, anavigation terminal device, a general television apparatus, an InternetProtocol television (IPTV), a portable terminal device, such as a smartphone, a tablet PC, a personal digital assistant (PDA) or a cellularphone, various display apparatuses used to reproduce images, such asadvertisements or movies in an industrial field, or various kinds ofaudio/video systems.

The display apparatus includes a light source module configured toconvert electrical information into visual information, and the lightsource module includes a plurality of light sources configured toindependently emit light. Each of the plurality of light sourcesincludes, for example, a light emitting diode (LED) or an organic lightemitting diode (OLED). For example, the LED or the OLED may be mountedon a circuit board or a substrate.

Recently, display apparatuses have become thinner and thinner. In orderto provide a thin display apparatus, a light source module must alsobecome thinner. Because a thickness of the light source module isreduced, a light source may be miniaturized and the number of lightsources disposed in the light source module may be increased. Theminiaturization of the light source and the increase in the number oflight sources may cause optical defects (for example, unevenness) of thelight source module.

SUMMARY

The present disclosure is directed to providing a display apparatuscapable of preventing or suppressing an optical defect (for example,unevenness).

According to one or more embodiments, a display device is provided. Thedisplay device includes a liquid crystal panel; a plurality of lightsources configured to emit blue light; a reflective sheet including fouredge portions and a center portion, wherein a plurality of holes aredisposed on the reflective sheet, the plurality of holes includes afirst hole and a second hole on each of the four edge portions of thereflective sheet, each of the four edge portions includes an edge of thereflective sheet, the first hole is disposed at a first distance fromthe edge of the reflective sheet, and the second hole is disposed at asecond distance from the edge of the reflective sheet, wherein thesecond distance is greater than the first distance; and a plurality oflight conversion dots including a plurality of first light conversiondots and a plurality of second light conversion dots, wherein theplurality of first light conversion dots are disposed around the firsthole of the reflective sheet, and the plurality of second lightconversion dots are disposed around the second hole of the reflectivesheet, wherein the plurality of holes further includes other holesdisposed on the center portion, no light conversion dot is disposedaround each of the other holes, and wherein the plurality of lightconversion dots comprise at least one of a fluorescent material, a dye,or a pigment.

According to one or more embodiments, a light apparatus for a displaydevice is provided. The light apparatus includes a reflective sheetincluding four edge portions and a center portion, wherein a pluralityof holes are disposed on the reflective sheet, the plurality of holesincludes a first hole and a second hole on each of the four edgeportions of the reflective sheet, each of the four edge portionsincludes an edge of the reflective sheet, the first hole is disposed ata first distance from the edge of the reflective sheet, and the secondhole is disposed at a second distance from the edge of the reflectivesheet, wherein the second distance is greater than the first distance;and a plurality of light conversion dots including a plurality of firstlight conversion dots and a plurality of second light conversion dots,wherein the plurality of first light conversion dots are disposed aroundthe first hole of the reflective sheet, and the plurality of secondlight conversion dots are disposed around the second hole of thereflective sheet, wherein the plurality of holes further includes otherholes disposed on the center portion, no light conversion dot isdisposed around each of the other holes, and wherein the plurality oflight conversion dots comprise at least one of a fluorescent material, adye, or a pigment.

A display apparatus according to an aspect of the present disclosure mayprevent or suppress an optical defect (for example, uneveness).

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a view of an appearance of a display apparatus according to anexemplary embodiment of the present disclosure.

FIG. 2 is an exploded view of the display apparatus according to anexemplary embodiment of the present disclosure.

FIG. 3 is a view of a liquid crystal panel of the display apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 4 is an exploded view of a light source apparatus of the displayapparatus according to an exemplary embodiment of the presentdisclosure.

FIG. 5 is a perspective view of a light source included in the lightsource apparatus according to an exemplary embodiment of the presentdisclosure.

FIG. 6 is a view of an example of a light emitting diode included in thelight source apparatus according to an exemplary embodiment of thepresent disclosure.

FIG. 7 is a view of a travel path of light in the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 8 is a view of a travel path of light at a center portion and anedge portion of the light source apparatus according to an exemplaryembodiment of the present disclosure.

FIG. 9 is a view of a light conversion patch arranged on the edgeportion of the light source apparatus according to an exemplaryembodiment of the present disclosure.

FIG. 10 is a view of an example of an arrangement of the lightconversion patch of left and right edge portions of the light sourceapparatus according to an exemplary embodiment of the presentdisclosure.

FIG. 11 is a view of an example of an arrangement of the lightconversion patch of a corner portion of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 12 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 13 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 14 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 15 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 16 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 17 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 18 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 19 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 20 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 21 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 22 is a view of an example of the light conversion patch arrangedon the edge portion of the light source apparatus according to anexemplary embodiment of the present disclosure.

DETAILED DESCRIPTION

In the following description, like reference numerals refer to likeelements throughout the specification. Well-known functions orconstructions are not described in detail since they would obscure theone or more exemplary embodiments with unnecessary detail. Terms such as“unit”, “module”, “member”, and “block” may be embodied as hardware orsoftware. According to embodiments, a plurality of “unit”, “module”,“member”, and “block” may be implemented as a single component or asingle “unit”, “module”, “member”, and “block” and may also include aplurality of components.

When an element is referred to as being “connected” to another element,it can be directly or indirectly connected to the other element, whereinthe indirect connection includes “connection via a wirelesscommunication network”.

Also, when a part “includes” or “may include” an element, unless thereis a particular description contrary thereto, the part may furtherinclude additional elements, not excluding the other elements.

When a first member is “on” a second member, the first member is incontact with the second member, but also includes when there is a thirdmember between the first and second members.

Although the terms first, second, third, etc., may be used herein todescribe various elements, is the elements should not be limited bythese terms. These terms are only used to distinguish one element fromanother element.

As used herein, the singular forms “a,” “an” and “the” include theplural forms of the words as well, unless the context clearly indicatesotherwise.

An identification code is used for the convenience of the descriptionbut is not intended to illustrate the order of each step. Each step maybe implemented in an order different from the illustrated order unlessthe context clearly indicates otherwise.

Hereinafter exemplary embodiments of the present disclosure will bedescribed in detail with reference to the accompanying drawings.

FIG. 1 is a view depicting of a display apparatus according to anexemplary embodiment of the disclosure.

A display apparatus 1 is a device that processes an image signalreceived from an outside source and visually displays the processedimage. Hereinafter an exemplary embodiment of a display apparatus 1 thatis a television is described, but the present disclosure is not limitedthereto. For example, the display apparatus 1 may be implemented invarious forms, such as a monitor, a portable multimedia device, and aportable communication device and the display apparatus 1 is not limitedin its shape as long as the display apparatus 1 visually displays animage.

The display apparatus 1 may be a large format display (LFD) installedoutdoors, such as a roof of a building or a bus stop. The LFD displayapparatus 1 is not limited to the outside of a building, and thus thedisplay apparatus 1 according to an exemplary embodiment may beinstalled in any place where the display apparatus is viewable by alarge number of people, including indoors such as in subway stations,shopping malls, movie theaters, companies, and stores.

The display apparatus 1 may receive content data including video dataand audio data from various content sources and output video and audiocorresponding to the video data and the audio data. For example, thedisplay apparatus 1 may receive content data through a broadcastreception antenna or cable, receive content data from a content playbackdevice, or receive content data from a content provider's contentserver.

As illustrated in FIG. 1, the display apparatus 1 may include a body 11,and/or a screen 12 configured to display an image I.

The body 11 may form an appearance, e.g., a border, of the displayapparatus 1, and the body 11 may include a component configured to allowthe display apparatus 1 to display the image I and to perform variousfunctions. Although the body 11 shown in FIG. 1 is in the form of a flatplate, the shape of the body 11 is not limited thereto. For example, thebody 11 may have a curved plate shape.

The screen 12 may be formed on a front surface of the body 11, anddisplay the image I. For example, the screen 12 may display a stillimage or a moving image. Further, the screen 12 may display atwo-dimensional plane image or a three-dimensional image to the userusing binocular parallax.

For example, the screen 12 may include a self-emission panel (forexample, a light emitting diode panel or an organic light emitting diodepanel) configured to directly emit light, or a non-self-emission panel(for example, a liquid crystal panel) configured to transmit or blocklight emitted by a light source apparatus (for example, a backlightunit).

A plurality of pixels P may be formed on the screen 12 and the image Idisplayed on the screen 12 may be formed by the light emitted from theplurality of pixels P. For example, a single still image may be formedon the screen 12 by combining light emitted from the plurality of pixelsP as a mosaic.

Each of the plurality of pixels P may emit different brightness anddifferent color of light. In order to emit light in the various colors,the plurality of pixels P may include sub-pixels P_(R), P_(G), andP_(B).

The sub-pixels may include a red sub pixel P_(R) emitting red light, agreen sub pixel P_(G) emitting green light, and a blue sub pixel P_(B)emitting blue light. For example, the red light may represent a lightbeam having a wavelength of approximately 620 nm (nanometers, onebillionth of a meter) to 750 nm, the green light may represent a lightbeam having a wavelength of approximately 495 nm to 570 nm, and the bluelight may represent a light beam having a wavelength of approximately450 nm to 495 nm.

By combining the red light of the red sub pixel P_(R), the green lightof the green sub pixel P_(G) and the blue light of the a blue sub pixelP_(B), each of the plurality of pixels P may emit different brightnessand different color of light.

FIG. 2 is an exploded view of the display apparatus according to anexemplary embodiment of the present disclosure. FIG. 3 is a view of aliquid crystal panel of the display apparatus according to an exemplaryembodiment of the present disclosure.

As shown in FIG. 2, various components configured to generate the imageI on the screen 12 may be provided inside the body 11.

For example, the body 11 includes a light source apparatus 100 that is asurface light source, a liquid crystal panel 20 configured to block ortransmit light emitted from the light source apparatus 100, a controlassembly 50 configured to control an operation of the light sourceapparatus 100 and the liquid crystal panel 20, and a power assembly 60configured to supply power to the light source apparatus 100 and theliquid crystal panel 20. Further, the body 11 may include a bezel 13, aframe middle mold 14, a bottom chassis 15, and a rear cover 16 which areconfigured to support and fix the liquid crystal panel 20, the lightsource apparatus 100, the control assembly 50, and the power assembly60.

The light source apparatus 100 may include a point light sourceconfigured to emit monochromatic light or white light. The light sourceapparatus 100 may refract, reflect, and/or scatter light in order toconvert light, which is emitted from the point light source, intouniform surface light. As mentioned above, the light source apparatus100 may refract, reflect, and/or scatter light, which is emitted fromthe point light source, thereby emitting uniform surface light towardthe front.

A configuration of the light source apparatus 100 will be described inmore detail below.

The liquid crystal panel 20 is provided in front of the light sourceapparatus 100 and blocks or transmits light emitted from the lightsource apparatus 100 to form the image I.

A front surface of the liquid crystal panel 20 may form the screen —12of the display apparatus 1 described above, and the liquid crystal panel20 may form the plurality of pixels P. In the liquid crystal panel 20,the plurality of pixels P may independently block or transmit light ofthe light source apparatus 100, and the light transmitted through theplurality of pixels P may form the image I displayed on the screen 12.

For example, as shown in FIG. 3, the liquid crystal panel 20 may includea first polarizing film 21, a first transparent substrate 22, a pixelelectrode 23, a thin film transistor 24, a liquid crystal layer 25, acommon electrode 26, a color filter 27, a second transparent substrate28, and a second polarizing film 29.

The first transparent substrate 22 and/or the second transparentsubstrate 28 may fixedly support the pixel electrode 23, the thin filmtransistor 24, the liquid crystal layer 25, the common electrode 26,and/or the color filter 27. The first transparent substrate 22 and/orthe second transparent substrate 28 may be formed of tempered glass ortransparent resin.

The first polarizing film 21 and/or the second polarizing film 29 areprovided on the outside of the first transparent substrate 22 and/or thesecond transparent substrate 28. Each of the first polarizing film 21and the second polarizing film 29 may transmit a specific polarizedlight beam and block (reflect or absorb) other polarized light beams.For example, the first polarizing film 21 transmits polarized lightbeams in a first direction and blocks (reflect or absorb) otherpolarized light beams. In addition, the second polarizing film 29transmits polarized light beams in a second direction and blocks(reflect or absorb) other polarized light beams. In this case, the firstdirection and the second direction may be perpendicular to each other.Accordingly, the polarized light beam transmitted through the firstpolarizing film 21 may not pass through the second polarizing film 29.

The color filter 27 may be provided inside the second transparentsubstrate 28. The color filter 27 may include a red filter 27Rtransmitting red light, a green filter 27G transmitting green light, anda blue filter 27G transmitting blue light. The red filter 27R, the greenfilter 27G, and the blue filter 27B may be disposed parallel to eachother. A region in which the color filter 27 is formed corresponds tothe pixel P described above. A region in which the red filter 27R isformed corresponds to the red sub-pixel P_(R), a region in which thegreen filter 27G is formed corresponds to the green sub-pixel P_(G), anda region in which the blue filter 27B is formed corresponds to the bluesub-pixel P_(B).

The pixel electrode 23 may be provided inside the first transparentsubstrate 22, and the common electrode 26 may be provided inside thesecond transparent substrate 28. The pixel electrode 23 and the commonelectrode 26 may be formed of a metal material through which electricityis conducted. The pixel electrode 23 and the common electrode 26 maygenerate an electric field to change the arrangement of liquid crystalmolecules 25 a forming the liquid crystal layer 25 to be describedbelow.

The thin film transistor (TFT) 24 is provided inside the secondtransparent substrate 22. The TFT 24 may transmit or block a currentflowing through the pixel electrode 23. For example, an electric fieldmay be formed or removed between the pixel electrode 23 and the commonelectrode 26 in response to turning on (closing) or turning off(opening) the TFT 24.

The liquid crystal layer 25 is formed between the pixel electrode 23 andthe common electrode 26. The liquid crystal layer 25 is filled with theliquid crystal molecules 25 a. Liquid crystals represent an intermediatestate between a solid (crystal) and a liquid. Liquid crystals alsoexhibit optical properties according to changes in an electric field.For example, in the liquid crystal, the direction of an arrangement ofmolecules forming the liquid crystal may change according to a change inan electric field. As a result, the optical properties of the liquidcrystal layer 25 may vary depending on the presence or absence of anelectric field transmitted through the liquid crystal layer 25.

A cable 20 a configured to transmit image data to the liquid crystalpanel 20, and a display driver integrated circuit (hereinafter referredto as ‘panel driver’) 30 configured to process digital image data andoutput an analog image signal are provided at one side of the liquidcrystal panel 20.

The cable 20 a may electrically connect the control assembly 50 and/orthe power assembly 60 to the panel driver 30, and may also electricallyconnect the panel driver 30 to the liquid crystal panel 20. The cable 20a may include a flexible flat cable or a film cable that is bendable.

The panel driver 30 may receive image data and/or power from the controlassembly 50 and/or the power assembly 60 through the cable 20 a. Thepanel driver 30 may transmit the image data and driving current to theliquid crystal panel 20 through the cable 20 a.

In addition, the cable 20 a and the panel driver 30 may be integrallyimplemented as a film cable, a chip on film (COF), or a tape carrierpackage (TCP). In other words, the panel driver 30 may be disposed onthe cable 20 a. However, the disclosure is not limited thereto, and thepanel driver 30 may be disposed on the liquid crystal panel 20.

The control assembly 50 may include a control circuit configured tocontrol an operation of the liquid crystal panel 20 and the light sourceapparatus 100. For example, the control circuit may process image datareceived from an external content source, transmit the image data to theliquid crystal panel 20, and transmit dimming data to the light sourceapparatus 100.

The power assembly 60 may supply power to the light source apparatus 100to allow the light source apparatus 100 to output surface light and thepower assembly 60 may supply power the liquid crystal panel 20 to allowthe liquid crystal panel 20 to block or transmit the light of the lightsource apparatus 100.

The control assembly 50 and the power assembly 60 may be implementedwith a printed circuit board and various circuits mounted on the printedcircuit board. For example, the power circuit may include a capacitor, acoil, a resistance element, a processor, and a power circuit board onwhich the capacitor, the coil, the resistance element, and the processorare mounted. Further, the control circuit may include a memory, aprocessor, and a control circuit board on which the memory and theprocessor are mounted.

FIG. 4 is an exploded view of a light source apparatus of the displayapparatus according to an exemplary embodiment of the presentdisclosure. FIG. 5 is a perspective view of a light source included inthe light source apparatus according to an exemplary embodiment of thepresent disclosure. FIG. 6 is a view of an example of the light emittingdiode included in the light source apparatus according to an exemplaryembodiment of the present disclosure.

As illustrated in FIG. 4, the light source apparatus 100 may include alight source module 110 configured to generate light, a reflective sheet120 configured to reflect light, a diffuser plate 130 configured touniformly diffuse light, and an optical sheet 140 configured to improveluminance of light that is emitted.

The light source module 110 may include a plurality of light sources 111configured to emit light, and a substrate 112 configured to support/fixthe plurality of light sources 111.

The plurality of light sources 111 may be arranged in a predeterminedpattern to allow light to be emitted with uniform luminance. Theplurality of light sources 111 may be arranged in such a way that adistance between one light source and light sources adjacent thereto isthe same.

For example, as shown in FIG. 4, the plurality of light sources 111 maybe arranged in rows and columns. Accordingly, the plurality of lightsources 111 may be arranged such that an approximately square is formedby four adjacent light sources. In addition, any one light source may bedisposed adjacent to four light sources, and a distance between onelight source and four adjacent light sources may be approximately thesame.

Alternatively, the plurality of light sources may be disposed in aplurality of rows, and a light source belonging to each row may bedisposed at the center of two light sources belonging to an adjacentrow. Accordingly, the plurality of light sources may be arranged suchthat an approximately equilateral triangle is formed by three adjacentlight sources. In this case, one light source may be disposed adjacentto six light sources, and a distance between one light source and sixadjacent light sources may be approximately the same.

However, the pattern in which the plurality of light sources 111 isdisposed is not limited to the pattern described above, and theplurality of light sources 111 may be disposed in various patterns toallow light to be emitted with uniform luminance.

The light source 111 may employ an element configured to emitmonochromatic light (light of a specific wavelength or light of a singlepeak wavelength, for example, blue light) or white light (light of aplurality of peak wavelengths, for example, light of a mixture of redlight, green light, and blue light) in various directions by receivingpower.

Each of the plurality of light source 111 may include a light emittingdiode (LED) 190, and an optical dome 180.

To reduce a thickness of the display apparatus 1, a thickness of theoptical device 100 may be reduced. A thickness of each of the pluralityof light sources 111 is reduced to allow the thickness of the opticaldevice 100 to be reduced resulting in a simplified structure.

The LED 190 may be directly attached to the substrate 112 in a Chip OnBoard (COB) method. In other words, the light source 111 may include theLED 190 where a light emitting diode chip or a light emitting diode dieis directly attached to the substrate 112 without an additional package.

The LED 190 may be manufactured in the flip chip type. As for theflip-chip type LED 190, when attaching the light emitting diodecorresponding to a semiconductor device to the substrate 112, anintermediate medium, such as a metal lead (wire) or a ball grid array(BGA) may not be used. Instead, an electrode pattern of thesemiconductor device may be fused to the substrate 112 as it is.Accordingly, because the metal lead (wire) or the ball grid array isomitted, the light source 111 including the flip-chip type LED 190 maybe miniaturized.

For example, the LED 190 may be a Distributed Bragg Reflector (DBR)based LED including a DBR, as shown in FIG. 6.

The LED 190 may include a transparent substrate 195, an n-typesemiconductor layer 193 (for example, n-type GaN, or n-type galliumnitride) and a p-type semiconductor layer 192 (for example, p-type GaN,or p-type gallium nitride). Between the n-type semiconductor layer 193and the p-type semiconductor layer 192, a multi-quantum well (MQW) layer194 and an electron-blocking layer (EBL) 197 are formed. In response toa current being supplied to the LED 190, electrons and holes arerecombined in the MQW layer 194 and thus light may be emitted.

A first electrode 191 a of the LED 190 is in electrical contact with thep-type semiconductor layer 192, and a second electrode 191 b is inelectrical contact with the n-type semiconductor layer 193. The firstelectrode 191 a and the second electrode 191 b may function not only aselectrodes, but also as reflectors configured to reflect light.

A DBR layer 196 is provided on the outside of the transparent substrate195. The DBR layer 196 may be formed by laminating a material having adifferent refractive index, and the DBR layer 196 may reflect incidentlight. Because the DBR layer 196 is provided outside the transparentsubstrate 195 (an upper side in the drawing), light perpendicularlyincident on the DBR layer 196 may be reflected by the DBR layer 196.Therefore, an intensity of light, which is emitted in a directionperpendicular to the DBR layer 196 (an upward direction of the lightemitting diode in the drawing) D1, is less than an intensity of light,which is emitted in a direction inclined with respect to the DBR layer196 (for example, a direction inclined by approximately 60 degrees fromthe upward direction in the drawing) D2. In other words, the LED 190 mayemit stronger light in a lateral direction than in a vertical direction.

In the above description, the flip-chip type LED 190 directly fused onthe substrate 112 in the COB method has been described, but the lightsource 111 is not limited to the flip-chip type LED 190. For example,the light source 111 may include a package type LED.

The optical dome 180 may cover the LED 190. The optical dome 180 mayprevent or suppress damages to the LED 190 caused by an externalmechanical action and/or damage to the LED 190 caused by to a chemicalaction.

The optical dome 180 may have a dome shape formed in such a way that asphere is cut into a surface not including the center thereof, or mayhave a hemispherical shape in such a way that a sphere is cut into asurface including the center thereof. A vertical cross section of theoptical dome 180 may be a bow shape or a semicircle shape.

The optical dome 180 may be formed of silicone or epoxy resin. Forexample, the molten silicon or epoxy resin may be discharged onto theLED 190 through a nozzle, and the discharged silicon or epoxy resin maybe cured, thereby forming the optical dome 180.

Accordingly, the shape of the optical dome 180 may vary depending on theviscosity of the liquid silicone or epoxy resin. For example, theoptical dome 180 is manufactured using silicon having a thixotropicindex of about 2.7 to 3.3 (appropriately, 3.0). Additionally, theoptical dome 180 may be formed with a dome ratio indicating a ratio of aheight of a dome with respect to a diameter of a base of the dome (theheight of the dome/the diameter of the base) of approximately 0.25 to0.31 (appropriately 0.28). For example, the optical dome 180 formed ofsilicon having a thixotropic index of approximately 2.7 to 3.3(appropriately 3.0) may have a diameter of approximately 2.5 mm(millimeter; 1/1,000 meter). The diameter of the optical dome 180 mayhave an error margin of approximately ±20%, and may be betweenapproximately 2.0 mm and 3.0 mm. The height of the optical dome 180 mayof approximately 0.7 mm. The height of the optical dome 180 may have anerror margin of approximately ±20% and may be between approximately 0.5mm and 0.9 mm.

However, the diameter (or size) of the optical dome 180 is not limitedthereto and thus the diameter (or size) of the optical dome 180 may beapproximately several hundred μm (micrometers; 1/1,000,000 meter) toseveral tens of mm.

The optical dome 180 may be optically transparent or translucent. Lightemitted from the LED 190 may pass through the optical dome 180 and beemitted to the outside.

In this case, the dome-shaped optical dome 180 may refract light like alens. For example, light emitted from the LED 190 may be refracted bythe optical dome 180 and thus may be dispersed.

As mentioned above, the optical dome 180 may protect the LED 190 fromexternal mechanical and/or chemical or electrical actions, as well asdispersing light emitted from the LED 190.

In the above description, the optical dome 180 in the form of a silicondome has been described, but the light source 111 is not limited toincluding the optical dome 180. For example, the light source 111 mayinclude a lens for dispersing light emitted from the LED.

The substrate 112 may fix the plurality of light sources 111 to preventa change in the position of the light source 111. Further, the substrate112 may supply power, which is for the light source 111 to emit light,to the light source 111.

The substrate 112 may support/fix the plurality of light sources 111 andmay be configured with a synthetic resin, tempered glass, or a printedcircuit board (PCB) on which a conductive power supply line forsupplying power to the light source 111 is formed.

The reflective sheet 120 may reflect light emitted from the plurality oflight sources 111 forward or in a direction close to the front.

In the reflective sheet 120, a plurality of through holes 120 a isformed at positions corresponding to each of the plurality of lightsources 111 of the light source module 110. In addition, the lightsource 111 of the light source module 110 may pass through the throughhole 120 a and protrude to the front of the reflective sheet 120.Accordingly, the plurality of light sources 111 may emit light in frontof the reflective sheet 120. The reflective sheet 120 may reflect light,which is emitted toward the reflective sheet 120 from the plurality oflight sources 111, to the diffuser plate 130.

A size and arrangement of the through-holes 120 a may depend on a sizeand arrangement of the light source 111. For example, based on adiameter of the light source 111 being approximately 2.5 mm, a diameterof the through holes 120 a may be appropriately 4.5 mm. The diameter ofthe through holes 120 a may have an error margin of approximately ±20%,and may be between approximately 3.5 mm and 5.5 mm. In addition, adistance between the centers of the through holes 120 a may beappropriately 11 mm. The distance between the centers of the throughholes 120 a may have an error margin of approximately ±20%, and may bebetween approximately 8.5 mm and 13.5 mm.

The diffuser plate 130 may be provided in front of the light sourcemodule 110 and/or the reflective sheet 120 and may evenly distribute thelight emitted from the light source 111 of the light source module 110.

As described above, the plurality of light sources 111 is located atequal intervals on the rear surface of the light source apparatus 100.Accordingly, unevenness in luminance may occur according to thepositions of the plurality of light sources 111.

The diffuser plate 130 may diffuse light emitted from the plurality oflight sources 111 within the diffuser plate 130 in order to removeunevenness in luminance caused by the plurality of light sources 111. Inother words, the diffuser plate 130 may uniformly emit uneven light ofthe plurality of light sources 111 to the front surface.

The optical sheet 140 may include various sheets for improving luminanceand uniformity of luminance. For example, the optical sheet 140 mayinclude a light conversion sheet 141, a diffusion sheet 142, a prismsheet 143, and a reflective polarizing sheet 144.

The light conversion sheet 141 may convert a wavelength of a portion ofincident light. For example, the light conversion sheet 141 may includea quantum dot (QD) material or a fluorescent material. Depending on theconstituent material, the light conversion sheet 141 may be referred toas a fluorescent sheet or a quantum dot sheet.

Quantum dots are nanometers (nm; 1/1,000,000,000 meter) of smallsphere-shaped semiconductor particles, and the quantum dot includesabout 2 nanometers [nm] to 10 [nm] of a core and a shell formed of zincsulfide (ZnS). The core of the quantum dot may be formed of cadmiumselenite (CdSe), cadmium telluride (CdTe), or cadmium sulfide (CdS).

The quantum dot emits a particular wavelength of light when an electricfield is applied or when absorbing high energy light. In this case, thewavelength of the emitted light may depend on the size of the quantumdot. The smaller quantum dot may emit the shorter wavelength of light,and the larger quantum dot may emit the longer wavelength of light. Forexample, a quantum dot having a diameter of approximately 2 nm may emitapproximately blue light, a quantum dot having a diameter ofapproximately 3 nm may emit approximately green light, and a quantum dothaving a diameter of approximately 6 nm may emit approximately redlight.

A material in which the quantum dot having the diameter of approximately3 nm and the quantum dot having the diameter of approximately 6 nm aremixed may absorb blue light or ultraviolet light and emit green lightand/or red light. For example, when blue light or ultraviolet light isincident on the light conversion sheet 141 on which a quantum dot havingthe diameter of approximately 3 nm and a quantum dot having the diameterof approximately 6 nm are mixed, a portion of blue light or ultravioletlight may be converted into green light and/or red light, and anotherportion of the light may pass through the light conversion sheet 141. Asa result, white light in which blue light, green light, and/or red lightare mixed may be emitted from the light conversion sheet 141.

The fluorescent material may convert blue light into yellow light ororange light, or convert blue light into red light and/or green light.

The light conversion sheet 141 may include a yellow (YAG) phosphor thatconverts blue light to yellow light or orange light, or a red/green (RG)phosphor that converts blue light to red light and/or green light. Forexample, the light conversion sheet 141 may include a K2SiF6 (KSF)phosphor or a K2TiF6 (KTF) phosphor.

The diffusion sheet 142 may diffuse light to improve uniformity of lighttransmitted through the light conversion sheet 141.

The prism sheet 143 may deflect the light, which passes through thediffusion sheet 142, to be directed to the front of the light sourceapparatus 100 (for example, a normal direction of a plane defined by thelight source apparatus). For example, light may be diffused in thediffusion sheet 142, and the light may be emitted in an obliquedirection from the diffusion sheet 142. By using refraction of light,the prism sheet 143 may deflect light in a normal direction of a planedefined by the prism sheet 143.

The reflective polarizing sheet 144 may transmit a portion of theincident light and reflect other portion of the incident light. Forexample, the reflective polarizing sheet 144 may transmit P-polarizedlight and reflect S-polarized light. In general, because the polarizingsheet absorbs polarized light, the luminance of the light sourceapparatus may be lowered. On the other hand, the reflective polarizingsheet 144 reflects polarized light, and thus the reflected light may berecycled in the light source apparatus 100.

The order of lamination of the optical sheet 140 is not limited to thatshown in FIG. 4. For example, the optical sheet 140 may be laminated insuch a way that the diffusion sheet 142->the optical change sheet141->the prism sheet 143->the reflective polarizing sheet 144 aresequentially laminated. Alternatively, the diffusion sheet 142->theprism sheet 143->the optical change sheet 141->the reflective polarizingsheet 144 may be sequentially laminated.

In addition, the optical sheet 140 is not limited to the sheet or filmillustrated in FIG. 4, and may include more various sheets or films,such as a protective sheet.

FIG. 7 is a view of a travel path of light in the light source apparatusaccording to an exemplary embodiment of the present disclosure. FIG. 8is a view of a travel path of light at a center portion and an edgeportion of the light source apparatus according to an exemplaryembodiment of the present disclosure. FIG. 9 is a view of a lightconversion patch arranged on the edge portion of the light sourceapparatus according to an exemplary embodiment of the presentdisclosure.

Referring to FIGS. 7 and 8, the light source apparatus 100 may includethe light source module 110, the reflective sheet 120, the diffuserplate 130, and/or the optical sheet 140.

The light source module 110 includes the plurality of point lightsources 111. Light emitted from the plurality of point light sources 111may be converted into uniform light while being transmitted through thediffuser plate 130 and/or the optical sheet 140.

For example, as shown in FIG. 7, light L1 may be emitted from the lightsource 111. Light L1 may include blue light having a wavelength ofapproximately 450 nm and 495 nm.

The light L1 may be transmitted through the diffuser plate 130 andincident on the optical sheet 140. The light L1 may be transmittedthrough the optical sheet 140 or may be reflected from the optical sheet140. In addition, although not shown in the drawings, a portion of thelight L1 may be absorbed by the diffuser plate 130 and/or the opticalsheet 140. The absorbed light may be converted into heat in the diffuserplate 130 and/or the optical sheet 140.

A portion of the light L1, which is light L2, may be transmitted throughthe optical sheet 140 and then be emitted to the outside of the lightsource apparatus 100. Particularly, the light L2 emitted from the lightsource apparatus 100 may be transmitted through the light conversionsheet 141 included in the optical sheet 140. A wavelength of a portionof the light 2 may be changed while being transmitted through the lightconversion sheet 141.

For example, a portion of the blue light contained in the light may betransmitted through the light conversion sheet 141, and another portionof the blue light may be changed to red light and/or green light by thelight conversion sheet 141. Accordingly, a ratio of blue light of lighttransmitted through the optical sheet 140 may be reduced, and a ratio ofred light and/or green light may be increased.

A portion of the light L1, which is light L3, may be reflected by theoptical sheet 140. For example, the light L3 may be reflected by thereflective polarizing sheet 144. Accordingly, a portion of the light maybe reflected by the reflective polarizing sheet 144, and thus the lightabsorbed by the polarizing sheets 21 and 29 of the liquid crystal panel20 may be reduced, thereby increasing the light recycling efficiency ofthe display apparatus 1 and thereby improving the luminance of thedisplay apparatus 1.

In addition, the light L3 reflected from the reflective polarizing sheet144 may be transmitted through the light conversion sheet 141. Forexample, the light may be transmitted through the light conversion sheet141 before and after being reflected by the reflective polarizing sheet144, respectively. Accordingly, the ratio of blue light of the light L3reflected from the reflective polarizing sheet 144 may be furtherreduced, and the ratio of red light and/or green light may be furtherincreased.

The light L3 may be moved toward the reflective sheet 120, and reflectedby the reflective sheet 120.

Light L4 reflected from the reflective sheet 120 may be againtransmitted through the diffuser plate 130 and incident on the opticalsheet 140. The light L4 may be transmitted through the optical sheet 140or may be reflected from the optical sheet 140.

A portion of the light L4, which is light L5, may be transmitted throughthe optical sheet 140, and emitted to the outside of the light sourceapparatus 100. The light L5 may be transmitted through the lightconversion sheet 141 included in the optical sheet 140. The ratio ofblue light of the light L5 transmitted through the light conversionsheet 141 may be further reduced, and the ratio of red light and/orgreen light may be further increased.

When the light is reflected by the reflective polarizing sheet 144 andthe reflective sheet 120, the light may be transmitted through the lightconversion sheet 141 several times, and thus the blue light may beconverted into the red light and/or the green light. Therefore, theratio of blue light, in the light L5 having been reflected a largenumber of times between the reflective polarizing sheet 144 and thereflective sheet 120, may be less than the ratio of blue light in thelight 2 having been reflected a small number of times between thereflective polarizing sheet 144 and the reflective sheet 120. Inaddition, a ratio of red light and/or green light of the light L5 may begreater than a ratio of red light and/or green light of the light L2.

In other words, the light L2 having been reflected a small number oftimes is bluish in comparison with the light L5 having a large number oftimes, and the light L5 is yellowish in comparison with the light L2.The light L2 and the light L5 may be mixed with each other and the lightsource apparatus 100 may emit white light in which the light L2 and thelight L5 are mixed. In addition, the white light emitted from the lightsource apparatus 100 may be incident on the liquid crystal panel 20.

At this time, a mixing ratio of the bluish light L2 and the yellowishlight 5 may vary according to a position of the light source apparatus100.

For example, as shown in FIG. 8, in various positions P1 and P2 of thelight source apparatus 100, the bluish light L2 and the yellowish lightL5 may be mixed and the mixed light may be emitted from the light sourceapparatus 100.

Light emitted from a first position P1 of a central portion of the lightsource apparatus 100 may include the light L2 emitted from the lightsource 111 (where the number of times transmitted through the lightconversion sheet is small), the light L5 reflected by the leftreflective sheet 120 (where the number of times transmitted through thelight conversion sheet is large), and the light L5 reflected by theright reflective sheet 120 of the light source 111 (where the number oftimes transmitted through the light conversion sheet is large).

Light emitted from a second position P2 of an edge portion of the lightsource apparatus 100 may include the light L2 emitted from the lightsource 111 (where the number of times transmitted through the lightconversion sheet is small), and the light L5 reflected by the rightreflective sheet 120 of the light source 111 (where the number of timestransmitted through the light conversion sheet is large).

Therefore, a ratio of bluish light contained in the light emitted fromthe first position P1 may be less than a ratio of bluish light containedin the light emitted from the second position P2. In other words, thelight emitted from the edge portion of the light source apparatus 100 ismore bluish than the light emitted from the central portion of the lightsource apparatus 100.

A user can relatively easily visually recognize a slight colordifference between different locations on the same display apparatus 1.In other words, the edge portion of the light source apparatus 100 ismore bluish than the center portion of the light source apparatus 100,that is, an optical defect can be easily recognized by a user.

For example, when a blue (or green) image, such as an image of the skyor an image of a sports game (for example, golf) is displayed across thescreen 12, a user can easily recognize the optical defect at the edgeportion of the display apparatus 1.

As another example, when a white image is displayed across the screen12, such as a snowy snow scene image, a user can easily recognize theoptical defect at the edge portion of the display apparatus 1 as well.

In order to prevent or suppress the optical defects at the edge portionof the display apparatus 1, a light conversion patch 200 including atleast one of a yellow fluorescent material, a red/green fluorescentmaterial, a yellow pigment, a red/green pigment, a yellow dye, ared/green dye, or a red/green quantum dot material may be applied,printed or coated on the edge portion of the light source apparatus 100,as shown in FIG. 9.

For example, on the edge portion of the reflective sheet 120, the lightconversion patch 200 may be applied, printed, or coated. The reflectivesheet 120 may be divided into a first region representing an edgeportion and a second region representing a central portion. The lightconversion patch 200 may be applied, printed, or coated on the firstregion of the reflective sheet 120, and the light conversion patch 200may not be applied, printed, or coated on the second region of thereflective sheet 120.

As another example, on the edge portion of the substrate 112, the lightconversion patch 200 may be applied, printed, or coated. The substrate112 may be divided into a first region representing an edge portion anda second region representing a central portion. The light conversionpatch 200 may be applied, printed, or coated on the first region of thesubstrate 112, and the light conversion patch 200 may not be applied,printed, or coated on the second region of the substrate 112.

The light conversion patch 200 may absorb a portion of blue light amongincident light, and may convert a portion of the absorbed blue lightinto yellow light, red light, or green light. In addition, the lightconversion patch 200 may absorb blue light among incident light and mayreflect yellow light, red light, or green light.

Accordingly, the ratio of blue light of the light, which is transmittedthrough the light conversion patch 200, may be reduced, and the ratio ofyellow light, red light, or green light of the light may be increased.

As mentioned above, the light emitted from the second position P2 of theedge portion of the light source apparatus 100 may include the light L2emitted from the light source 111 (where the number of times transmittedthrough the light conversion sheet is small), and the light L5 reflectedby the right reflective sheet 120 of the light source 111.

The light conversion patch 200 may be applied, printed, or coated on theedge portion of the reflective sheet 120. During the light L5 isreflected from the edge portion of the reflective sheet 120, a portionof blue light included in the light L5 may be converted into yellowlight, red light, or green light by the light conversion patch 200.Accordingly, the ratio of blue light in the light L5 may be reduced, andthe ratio of yellow light may be increased. In other words, the light L5may be more yellowish.

Accordingly, the ratio of bluish light included in the light emittedfrom the second position P2 may be reduced, and the light emitted fromthe edge portion of the light source apparatus 100 may be less bluish.Further, a difference between the ratio of blue light at the edgeportion of the light source apparatus 100 and the ratio of blue light atthe center portion of the light source apparatus 100 may be reduced toan extent that the user cannot recognize.

The light conversion patch 200 in the various types or in the variouspattern may be applied, printed or coated on the edge portion of thereflective sheet 120 or the edge portion of the substrate 112.

For example, the light conversion patch 200 may be applied, printed orcoated on the edge portion of the reflective sheet 120 to surround thethrough-holes 120 a, as shown in FIG. 9.

As mentioned above, the reflective sheet 120 may be divided into thefirst region representing the edge portion and the second regionrepresenting the central portion. In the first region of the reflectivesheet 120, a through hole, around which the light conversion patch 200is applied, printed or coated, may be disposed. In the second region ofthe reflective sheet 120, a through hole, around which the lightconversion patch 200 is not applied, printed or coated, may be disposed.

However, the type or pattern of the light conversion patch 200 as shownin FIG. 9 is only an example of applying, printing or coating the lightconversion patch 200, and thus the type or pattern of the lightconversion patch 200 is not limited thereto.

The light conversion patch 200 may be applied, printed, or coated tosurround the light source 111 on the edge portion of the substrate 112.The light conversion patch 200 arranged on the edge portion of thesubstrate 112 may be exposed through the through hole 120 a.

Hereinafter various types or patterns in which the light conversionpatch 200 is applied, printed or coated on the edge portion of the lightsource apparatus 100 will be described.

FIG. 10 is a view of an example of an arrangement of the lightconversion patch of left and right edge portions of the light sourceapparatus according to an exemplary embodiment of the presentdisclosure.

As illustrated in FIG. 10, the through hole 120 a, through which thelight from the plurality of light sources 111 passes, is formed on thereflective sheet 120. Further, on the edge portion of the reflectivesheet 120, the light conversion patch 200 may be applied, printed orcoated (hereinafter referred to as “arranged”).

The light conversion patch 200 may include a light conversion materialthat absorbs a portion of blue light among incident light and converts aportion of the absorbed blue light into yellow light, red light, orgreen light. For example, the light conversion patch 200 may include atleast one of a yellow fluorescent material, a red fluorescent material,a green fluorescent material, a red quantum dot material, or a greenquantum dot material.

In addition, the light conversion patch 200 may include a lightconversion material that absorbs a portion of blue light and reflectsyellow light, red light, or green light among incident light. Forexample, the light conversion patch 200 may include at least one of ayellow pigment, a red pigment, a green pigment, a yellow dye, a red dye,or a green dye.

The light conversion patch 200 may be approximately circular orelliptical. In addition, on the edge portion of the reflective sheet120, the light conversion patch 200 may be arranged around the throughholes 120 a to surround the through holes 120 a.

The light conversion patch 200 may include a plurality of first lightconversion patches 210 arranged around a first through hole 121 disposedin a first column in left and right edges 120 b of the reflective sheet120.

A size and/or number of the first light conversion patch 210 may dependon the arrangement and size of the through-holes 120 a. In response toan increase in the distance between the through holes 120 a and anincrease in the size of the through holes 120 a, the size of the firstlight conversion patches 210 may be increased or the number of firstlight conversion patches 210 may be increased.

For example, when the distance between the centers of the through-holes120 a is approximately 11.0 mm and the diameter of the through-holes 120a is approximately 4.5 mm, eight first light conversion patches 210 maybe arranged around the first through-hole 121. Each of the eight firstlight conversion patches 210 may have a diameter of approximately 1.0 mmto 2.0 mm. The diameter of each of the first light conversion patches210 may approximately 1.5 mm, and the diameter thereof may have an errormargin of ±20%. In addition, according to an exemplary embodiment, thediameter of each of the first light conversion patches 210 may beapproximately 1.3 mm or 1.1 mm.

The plurality of first light conversion patches 210 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the first through hole 121. In addition, the plurality offirst light conversion patches 210 may be arranged at approximatelyequal angular intervals with respect to a virtual central point in thefirst through hole 121. For example, the eight first light conversionpatches 210 may be arranged at an angular interval of approximately 45degrees with respect to the virtual central point in the first throughhole 121.

The light conversion patch 200 may include a plurality of second lightconversion patches 220 arranged around a second through hole 122disposed in a second column in the left and right edges 120 b of thereflective sheet 120.

A size and/or number of the second light conversion patches 220 maydepend on the arrangement and size of the through-holes 120 a. Forexample, when the distance between the centers of the through-holes 120a is approximately 11.0 mm and the diameter of the through-holes 120 ais approximately 4.5 mm, four second light conversion patches 220 may bearranged around the second through-hole 122. Each of the four secondlight conversion patches 220 may have a diameter of approximately 0.8 mmto 1.5 mm. The diameter of each of the second light conversion patches220 may approximately 1.3 mm, and the diameter thereof may have an errormargin of ±20%. In addition, according to an exemplary embodiment, thediameter of each of the second light conversion patches 220 may beapproximately 1.2 mm, 1.1 mm, or 0.9 mm.

The plurality of second light conversion patches 220 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the second through hole 122. In addition, the plurality ofsecond light conversion patches 220 may be arranged at approximatelyequal angular intervals with respect to a virtual central point in thesecond through hole 122. For example, the four second light conversionpatches 220 may be arranged at an angular interval of approximately 90degrees with respect to the virtual central point in the second throughhole 122.

The light conversion patch 200 may include a plurality of third lightconversion patches 230 arranged around a third through hole 123 disposedin a third column in the left and right edges of the reflective sheet120.

A size and/or number of the third light conversion patches 230 maydepend on the arrangement and size of the through-holes 120 a. Forexample, when the distance between the centers of the through-holes 120a is approximately 11.0 mm and the diameter of the through-holes 120 ais approximately 4.5 mm, three third light conversion patches 230 may bearranged around the third through-hole 123. Each of the three thirdlight conversion patches 230 may have a diameter of approximately 0.6 mmto 1.3 mm. The diameter of each of the third light conversion patches230 may approximately 1.1 mm, and the diameter thereof may have an errormargin of ±20%. In addition, according to an exemplary embodiment, thediameter of each of the third light conversion patches 230 may beapproximately 0.9 mm or 0.7 mm.

The plurality of third light conversion patches 230 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the third through hole 123. For example, the three thirdlight conversion patches 230 may be arranged at an angular interval ofapproximately 45 degrees or 90 degrees with respect to the virtualcentral point in the third through hole 123.

The diameters of the first light conversion patches 210, the secondlight conversion patches 220, and the third light conversion patches 230may be variously combined. For example, the diameter of the first lightconversion patches 210, the second light conversion patches 220, and thethird light conversion patches 230 may be approximately 1.5 mm,approximately 1.3 mm, and approximately 1.1 mm, respectively. As anotherexample, the diameter of the first light conversion patches 210, thesecond light conversion patches 220, and the third light conversionpatches 230 may be approximately 1.3 mm, approximately 1.2 mm, andapproximately 1.1 mm, respectively. As another example, the diameter ofthe first light conversion patches 210, the second light conversionpatches 220, and the third light conversion patches 230 may beapproximately 1.3 mm, approximately 1.1 mm, and approximately 0.9 mm,respectively. As another example, the diameter of the first lightconversion patches 210, the second light conversion patches 220, and thethird light conversion patches 230 may be approximately 1.1 mm,approximately 0.9 mm, and approximately 0.7 mm, respectively.

The light conversion patch 200 may not be only arranged around thethrough holes 120 a of the edge portion of the reflective sheet 120, butalso arranged between the through holes 120 a and the through holes 120a of the edge portion of the reflective sheet 120.

For example, between the first through hole 121 of the reflective sheet120 and the second through hole 122 of the reflective sheet 120, threelight conversion patches may be arranged. A diameter of the lightconversion patch arranged between the first through hole 121 and thesecond through hole 122 may be between approximately 1.0 mm to 2.0 mm,and appropriately 1.5 mm.

Between the second through hole 122 of the reflective sheet 120 and thethird through hole 123 of the reflective sheet 120, three lightconversion patches may be arranged. A diameter of the light conversionpatch arranged between the second through hole 122 and the third throughhole 123 may be between approximately 0.8 mm to 1.5 mm, andappropriately 1.3 mm.

Three light conversion patches may be arranged on an inside of the thirdthrough hole 123 of the reflective sheet 120. A diameter of the lightconversion patch arranged inside the third through hole 123 may bebetween approximately 0.5 mm and 1.1 mm, and appropriately approximately0.9 mm.

As described above, at the right and left edge portions of thereflective sheet 120, the first light conversion patch 210, the secondlight conversion patches 220 and/or the third light conversion patch 230may be arranged.

The size of each of the first light conversion patches 210 arranged atthe outermost side of the left and right edge portions of the reflectivesheet 120 is greater than the size of each of the second lightconversion patches 220 arranged more inside than the first lightconversion patches 210. The distance between the first light conversionpatches 210 is less than the distance between the second lightconversion patches 220. Further, the number of the first lightconversion patches 210 is greater than the number of the second lightconversion patches 220.

The size of each of the second light conversion patches 220 is greaterthan the size of each of the third light conversion patches 230 arrangedfurther inside than the second light conversion patches 220. Thedistance between the second light conversion patches 220 is less thanthe distance between the third light conversion patches 230. Further,the number of the second light conversion patches 220 is greater thanthe number of the third light conversion patches 230.

As mentioned above, as the distance from the left and right edges 120 bof the reflective sheet 120 to the light conversion patch 200 isincreased, the size of the light conversion patch 200 may be reduced,the distance between the light conversion patches 200 may be increased,and the number of light conversion patches 200 may be reduced. Inaddition, as the distance from the left and right edges 120 b of thereflective sheet 120 to the light conversion patch 200 is increased, aratio of an area occupied by the light conversion patch 200 may bereduced.

Accordingly, when the light is reflected by the edge portion of thereflective sheet 120, the ratio of blue light contained in the light maybe reduced, and the ratio of yellow light may be further increased. Itis possible to relieve a difficulty in which an amount of light L5,which has the large number of times transmitted through the lightconversion sheet, in the edge portion of the light source apparatus 100is less than an amount of light L5 in the central portion of the lightsource apparatus 100. Further, a defect, in which the edge portion ofthe light source apparatus 100 is more bluish than the central portionof the light source apparatus 100 may be eliminated.

FIG. 11 is a view of an example of an arrangement of the lightconversion patch of a corner portion of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

FIG. 10 illustrates the arrangement of the light conversion patch 200 atthe left and right edges of the light source apparatus 100, but thelight conversion patch 200 may be also arranged at upper and lower edgesof the light source apparatus 100. Further, the light conversion patch200 may be arranged at a corner portion of the light source apparatus100.

As illustrated in FIG. 11, on the reflective sheet 120, the plurality ofthrough-holes 120 a is formed. In addition, the light conversion patch200 may be applied, printed, or coated on the left and right edgeportions, upper and lower edge portions, and corner portions of thereflective sheet 120. The light conversion patch 200 may be the same asthe light conversion patch 200 described in FIG. 10.

The light conversion patch 200 may include first light conversionpatches 210 arranged around the first through hole 121 in the left andright edge portions of the reflective sheet 120, second light conversionpatches 220 arranged around the second through hole 122, and third lightconversion patches 230 arranged around the third through hole 123.

A description of the first light conversion patches 210, the secondlight conversion patches 220, and the third light conversion patches 230will be replaced with the description of the first light conversionpatches 210, the second light conversion patches 220, and the thirdlight conversion patches 230 described with reference to FIG. 10.

The light conversion patch 200 may include a plurality of fourth lightconversion patches 240 arranged around a fourth through hole 124disposed in a first row from the upper and lower edges 120 c of thereflective sheet 120. For example, eight fourth light conversion patches240 may be arranged around the fourth through-hole 124. Each of theeight fourth light conversion patches 240 may have a diameter ofapproximately 1.1 mm to 2.1 mm. The diameter of each of the eight fourthlight conversion patches 240 may appropriately be 1.6 mm, and thediameter thereof may have an error margin of ±20%.

The plurality of fourth light conversion patches 240 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the fourth through hole 124. In addition, the plurality offourth light conversion patches 240 may be arranged at approximatelyequal angular intervals with respect to a virtual central point in thefourth through hole 124. For example, the eight fourth light conversionpatches 240 may be arranged at an angular interval of approximately 45degrees with respect to the virtual central point in the fourth throughhole 124.

The light conversion patch 200 may include a plurality of fifth lightconversion patches 250 arranged around a fifth through hole 125 disposedin a second row from the upper and lower edges 120 c of the reflectivesheet 120. For example, four fifth light conversion patches 250 may bearranged around the fifth through hole 125. Each of the four fifth lightconversion patches 250 may have a diameter of approximately 0.9 mm to1.6 mm. The diameter of each of the fifth light conversion patches 250may appropriately be 1.4 mm, and the diameter thereof may have an errormargin of ±20%.

The plurality of fifth light conversion patches 250 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the fifth through hole 125. In addition, the plurality offifth light conversion patches 250 may be arranged at approximatelyequal angular intervals with respect to a virtual central point in thefifth through hole 125. For example, the four fifth light conversionpatches 250 may be arranged at an angular interval of approximately 90degrees with respect to the virtual central point in the fifth throughhole 125.

The light conversion patch 200 may include a plurality of sixth lightconversion patches 260 arranged around a sixth through hole 126 disposedin a third row from the upper and lower edge portion of the reflectivesheet 120. For example, three sixth light conversion patches 260 may bearranged around the sixth through hole 126. Each of the three sixthlight conversion patches 260 may have a diameter of approximately 0.7 mmto 1.4 mm. The diameter of each of the sixth light conversion patches260 may appropriately be 1.2 mm, and the diameter thereof may have anerror margin of ±20%.

The plurality of sixth light conversion patches 260 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the sixth through hole 126. For example, the three sixthlight conversion patches 260 may be arranged at an angular interval ofapproximately 45 degrees or approximately 90 degrees with respect to thevirtual central point in the sixth through hole 126.

In addition, a seventh through hole 127 is arranged at the cornerportion of the reflective sheet 120, and the seventh through hole 127 isarranged closest to the corner of the reflective sheet 120. In otherwords, a distance between the corner of the reflective sheet 120 and theseventh through hole 127 may be minimized such that the distance betweenthe corner of the reflective sheet 120 and the seventh through hole isless than the distance between the corner of the reflection sheet 120and the other through holes. A plurality of seventh light conversionpatches 270 may be arranged around the seventh through hole 127. Forexample, eight seventh light conversion patches 270 may be arrangedaround the seventh through hole 127. Each of the eight seventh lightconversion patches 270 may have a diameter of approximately 1.5 mm to2.5 mm. The diameter of each of the seventh light conversion patches 270may appropriately be 2.0 mm, and the diameter thereof may have an errormargin of ±20%.

The plurality of seventh light conversion patches 270 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the seventh through hole 127. In addition, the plurality ofseventh light conversion patches 270 may be arranged at approximatelyequal angular intervals with respect to a virtual central point in theseventh through hole 127. For example, the eight seventh lightconversion patches 270 may be arranged at an angular interval ofapproximately 45 degrees with respect to the virtual central point inthe seventh through hole 127.

As described above, in the upper and lower edge portions of thereflective sheet 120, the fourth light conversion patches 240, the fifthlight conversion patches 250, and/or the sixth light conversion patches260 may be arranged.

The size of each of the fourth light conversion patches 240 arranged atthe outermost side of the upper and lower edge portions of thereflective sheet 120 is greater than the size of each of the fifth andsixth light conversion patches 250 and 260 arranged more inside than thefirst light conversion patches 210. The distance between the fourthlight conversion patches 240 is less than the distance between the fifthand sixth light conversion patches 250 and 260. Further, the number ofthe fourth light conversion patches 240 is greater than the number ofthe fifth and sixth light conversion patches 250 and 260.

As mentioned above, as the distance from the upper and lower edges 120 cof the reflective sheet 120 to the light conversion patch 200 isincreased, the size of the light conversion patch 200 may be reduced,the distance between the light conversion patches 200 may be increased,and the number of light conversion patches 200 may be reduced. Inaddition, a ratio of an area occupied by the light conversion patch 200may be reduced as the distance from outermost side of the upper andlower edge portions towards the center portion of the reflective sheet120 is increased.

The size of the light conversion patches 240, 250, and 260 arranged onthe upper and lower edge portions of the reflective sheet 120 may bedifferent from the size of the light conversion patches 210, 220, and230 arranged on the left and right edge portions of the reflective sheet120. For example, the diameter of each of the fourth light conversionpatches 240 arranged at the outermost side of the upper and lower edgeportions of the reflective sheet 120 may be greater than the diameter ofeach of the first light conversion patches 210 arranged at the outermostside of the left and right edge portions of the reflective sheet 120.Further, the diameter of each of the fifth and sixth light conversionpatches 250 and 260 arranged at the inner side of the outermost side ofthe upper and lower edge portions of the reflective sheet 120 may begreater than the diameter of each of the second and third lightconversion patches 220 and 230 arranged at the inner side of theoutermost side of the left and right edge portions of the reflectivesheet 120.

The seventh light conversion patch 270 may be arranged at the cornerportion of the reflective sheet 120.

The size of the seventh light conversion patches 270 arranged at thecorner portions of the reflective sheet 120 may be different from thesize of the light conversion patches 210, 220, 230, 240, 250, and 260arranged at the left and right/upper and lower portion of the reflectivesheet 120. For example, the diameter of the seventh light conversionpatches 270 may be greater than the diameter of the first and fourthlight conversion patches 210 and 240 arranged at the outermost side ofthe left and right/upper and lower portion of the reflective sheet 120.

Accordingly, when the light is reflected by the corner portion of thereflective sheet 120, the ratio of blue light contained in the light maybe reduced, and the ratio of yellow light may be further increased. Itis possible to relieve a defect in which an amount of light L5, whichhas the large number of times transmitted through the light conversionsheet, in the corner portion of the light source apparatus 100 is lessthan an amount of light L5 in the central portion of the light sourceapparatus 100. Further, a defect (e.g., optical defect), in which thecorner portion of the light source apparatus 100 is more bluish than thecentral portion of the light source apparatus 100 may be eliminated.

In the above description, the size of the light conversion patchesarranged at the outermost side of the left and right/upper and loweredge portions of the reflective sheet 120 is different from the size ofthe light conversion patches arranged at the inner side of the outermostside, and the distance between the light conversion patches arranged atthe outermost side of the left and right/upper and lower edge portionsof the reflective sheet 120 is different from the distance between thelight conversion patches arranged at the inner side of the outermostside. However, the arrangement of the light conversion patches is notlimited to thereto.

FIG. 12 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 12, a light conversion patch 200 may be arrangedaround the through hole 120 a at the edge portion of the reflectivesheet 120. The light conversion patch 200 may be the same as the lightconversion patch described with reference to FIG. 10.

The light conversion patch 200 may include a plurality of first lightconversion patches 210 arranged around a first through hole 121 disposedin a first column in left and right edges 120 b of the reflective sheet120. The size, arrangement, and number of the first light conversionpatches 210 may be the same as the first light conversion patches 210shown in FIG. 10. For example, the eight first light conversion patches210 may be arranged at an angular interval of approximately 45 degreeswith respect to the virtual central point in the first through hole 121.

The light conversion patch 200 may include a plurality of second lightconversion patches 220 arranged around a second through hole 122disposed in a second column in the left and right edges 120 b of thereflective sheet 120.

Unlike the second light conversion patches 220 shown in FIG. 10, thesize of the second light conversion patches 220 shown in FIG. 12 may beapproximately equal to the size of the first light conversion patches210. In other words, the diameter of the second light conversion patches220 may be approximately equal to the diameter of the first lightconversion patches 210. For example, the diameter of the first lightconversion patches 210 may be approximately 1.5 mm, and the diameter ofthe second light conversion patches 220 may also be approximately 1.5mm.

The plurality of second light conversion patches 220 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the second through hole 122, and the number of the secondlight conversion patches 220 may be the same as the number of the firstlight conversion patches 210. For example, the eight second lightconversion patches 220 may be arranged at an angular interval ofapproximately 45 degrees with respect to the virtual central point inthe second through hole 122.

The light conversion patch 200 may include a plurality of third lightconversion patches 230 arranged around a third through hole 123 disposedin a third column in the left and right edges 120 b of the reflectivesheet 120.

Unlike the third light conversion patches 230 shown in FIG. 10, the sizeof the third light conversion patches 230 shown in FIG. 12 may beapproximately equal to the size of the first light conversion patches210. In other words, the diameter of the third light conversion patches230 may be approximately equal to the diameter of the first lightconversion patches 210. For example, based on the diameter of the firstlight conversion patches 210 may be approximately 1.5 mm, and thediameter of the third light conversion patches 230 may also beapproximately 1.5 mm.

The plurality of third light conversion patches 230 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the third through hole 123, and the number of the thirdlight conversion patches 230 may be the same as the number of the firstlight conversion patches 210. For example, the eight third lightconversion patches 230 may be arranged at an angular interval ofapproximately 45 degrees with respect to the virtual central point inthe third through hole 123.

Although not shown in FIG. 12, the light conversion patch 200 mayinclude a plurality of fourth light conversion patches arranged around afourth through hole disposed in a first row in the upper and lower edges120 c of the reflective sheet 120, a plurality of fifth light conversionpatches arranged around a fifth through hole disposed in a second row,or a plurality of sixth light conversion patches arranged around a sixththrough hole disposed in a third row.

The size of the fourth, fifth, and sixth light conversion patches may bethe same as the size of the first light conversion patches 210, and thenumber of the fourth, fifth, and sixth light conversion patches may bethe same as the number of the first light conversion patches 210.

The light conversion patch 200 may include a plurality of seventh lightconversion patches arranged around a seventh through hole disposed atthe corner portion of the reflective sheet, and the size, number, andarrangement of the seventh light conversion patches may be the same asthe size, number, and arrangement of the first light conversion patches210.

Further, unlike that illustrated in FIG. 12, the second light conversionpatches 220 may be omitted, or the third light conversion patches 230may be omitted, or the second and third light conversion patches 220 and230 may be omitted. In other words, the light conversion patch 200 mayinclude only the first light conversion patches 210, or may include thefirst and second light conversion patches 210 and 220, or may includethe first and third light conversion patches 210 and 230.

FIG. 13 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 13, a light conversion patch 200 may be arrangedaround the through hole 120 a at the edge portion of the reflectivesheet 120. The light conversion patch 200 may be the same as the lightconversion patch described with reference to FIG. 10.

The light conversion patch 200 may include a plurality of first lightconversion patches 210 arranged around a first through hole 121 disposedin a first column from left and right edges 120 b of the reflectivesheet 120. The size, arrangement, and number of the first lightconversion patches 210 may be the same as the first light conversionpatches 210 shown in FIG. 10. For example, the eight first lightconversion patches 210 may be arranged at an angular interval ofapproximately 45 degrees with respect to a virtual central point in thefirst through hole 121.

The light conversion patch 200 may include a plurality of second lightconversion patches 220 arranged around a second through hole 122disposed in a second column from the left and right edges 120 b of thereflective sheet 120.

Unlike the second light conversion patches 220 shown in FIG. 10, thesize of the second light conversion patches 220 shown in FIG. 13 may beapproximately equal to the size of the first light conversion patches210. For example, the diameter of the first light conversion patches 210may be approximately 1.5 mm, and the diameter of the second lightconversion patches 220 may also be approximately 1.5 mm.

The number of the second light conversion patches 220 may be less thanthe number of the first light conversion patches 210, and the pluralityof second light conversion patches 220 may be arranged at approximatelyequal intervals along a circumference of a virtual circle surroundingthe second through hole 122. For example, the eight second lightconversion patches 220 may be arranged at an angular interval ofapproximately 45 degrees with respect to the virtual central point inthe second through hole 122.

The light conversion patch 200 may include a plurality of third lightconversion patches 230 arranged around a third through hole 123 disposedin a third column from the left and right edges 120 b of the reflectivesheet 120.

Unlike the third light conversion patches 230 shown in FIG. 10, the sizeof the third light conversion patches 230 shown in FIG. 13 may beapproximately equal to the size of the first light conversion patches210. For example, the diameter of the first light conversion patches 210may be approximately 1.5 mm, and the diameter of the third lightconversion patches 230 may also be approximately 1.5 mm.

The number of the third light conversion patches 230 may be less thanthe number of the second light conversion patches 220, and the pluralityof third light conversion patches 230 may be arranged at approximatelyequal intervals along a circumference of a virtual circle surroundingthe third through hole 123. For example, the three third lightconversion patches 230 may be arranged at an angular interval ofapproximately 90 degrees or approximately 180 degrees with respect tothe virtual central point in the third through hole 123.

Although not shown in FIG. 13, the light conversion patch 200 mayinclude a plurality of fourth light conversion patches, a plurality offifth light conversion patches or a plurality of sixth light conversionpatches.

The size of the fourth, fifth, and sixth light conversion patches may bethe same as the size of the first light conversion patches 210.

The number and arrangement of the fourth light conversion patches may bethe same as the number and arrangement of the first light conversionpatches 210. The number and arrangement of the fifth light conversionpatches may be the same as the number and arrangement of the secondlight conversion patches 220. The number and arrangement of the sixthlight conversion patches may be the same as the number and arrangementof the fifth light conversion patches 250.

The light conversion patch 200 may include a plurality of seventh lightconversion patches arranged around a seventh through hole disposed atthe corner portion of the reflective sheet, and the size, number, andarrangement of the seventh light conversion patches may be the same asthe size, number, and arrangement of the first light conversion patches210.

FIG. 14 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 14, a light conversion patch 200 may be arrangedaround the through hole 120 a at the edge portion of the reflectivesheet 120. The light conversion patch 200 may be the same as the lightconversion patch described with reference to FIG. 10.

The light conversion patch 200 may include a plurality of first lightconversion patches 210 arranged around a first through hole 121 disposedin a first column from left and right edges 120 b of the reflectivesheet 120. The size, arrangement, and number of the first lightconversion patches 210 may be the same as the first light conversionpatches 210 shown in FIG. 10. For example, the eight first lightconversion patches 210 may be arranged at an angular interval ofapproximately 45 degrees with respect to the virtual central point inthe first through hole 121.

The light conversion patch 200 may include a plurality of second lightconversion patches 220 arranged around a second through hole 122disposed in a second column from the left and right edges 120 b of thereflective sheet 120.

The size of the second light conversion patches 220 may be less than thesize of the first light conversion patches 210. For example, based onthe diameter of the first light conversion patches 210 beingapproximately 1.5 mm, the diameter of the second light conversionpatches 220 may also be approximately 1.3 mm.

Unlike the second light conversion patches 220 shown in FIG. 10, thenumber of the second light conversion patches 220 shown in FIG. 14 maybe the same as the number of the first light conversion patches 210. Theplurality of second light conversion patches 220 may be arranged atapproximately equal intervals along a circumference of a virtual circlesurrounding the second through hole 122. For example, the eight secondlight conversion patches 220 may be arranged at an angular interval ofapproximately 45 degrees with respect to the virtual central point inthe second through hole 122.

The light conversion patch 200 may include a plurality of third lightconversion patches 230 arranged around a third through hole 123 disposedin a third column from the left and right edges 120 b of the reflectivesheet 120.

The size of the third light conversion patches 230 may be less than thesize of the second light conversion patches 220. For example, thediameter of the second light conversion patches 220 may be approximately1.3 mm, and the diameter of the third light conversion patches 230 mayalso be approximately 1.1 mm.

Unlike the third light conversion patches 230 shown in FIG. 10, thenumber of the third light conversion patches 230 shown in FIG. 14 may bethe same as the number of the first and second light conversion patches210 and 220. The plurality of third light conversion patches 230 may bearranged at approximately equal intervals along a circumference of avirtual circle surrounding the third through hole 123. For example, theeight third light conversion patches 230 may be arranged at an angularinterval of approximately 45 degrees with respect to the virtual centralpoint in the third through hole 123.

Although not shown in FIG. 14, the light conversion patch 200 mayinclude a plurality of fourth light conversion patches, a plurality offifth light conversion patches or a plurality of sixth light conversionpatches.

The size of the fourth light conversion patches may be the same as thesize of the first light conversion patches 210, the size of the fifthlight conversion patches may be the same as the size of the second lightconversion patches 220, and the size of the sixth light conversionpatches may be the same as the size of the fifth light conversionpatches 250.

The number and arrangement of the fourth, fifth, and sixth lightconversion patches may be the same as the number and arrangement of thefirst light conversion patch 210.

The light conversion patch 200 may include a plurality of seventh lightconversion patches arranged around a seventh through hole disposed atthe corner portion of the reflective sheet, and the size, number, andarrangement of the seventh light conversion patches may be the same asthe size, number, and arrangement of the first light conversion patches210.

FIG. 15 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 15, a light conversion patch 200 may be arrangedaround a through hole at an edge portion of the reflective sheet 120.

The light conversion patch 200 may include a light conversion materialthat absorbs a portion of blue light among incident light and converts aportion of the absorbed blue light into yellow light, red light, orgreen light. In addition, the light conversion patch 200 may include alight conversion material that absorbs a portion of blue light andreflects yellow light, red light, or green light among incident light.

The light conversion patch 200 may be approximately a quadrangle.However, the shape of the light conversion patch 200 is not limited to aquadrangle, and thus the shape of the light conversion patch 200 may bea polygon including a triangle, a pentagon, or a hexagon.

The light conversion patch 200 may include a plurality of first lightconversion patches 210 arranged around a first through hole 121 disposedin a first column from the left and right edges 120 b of the reflectivesheet 120. The arrangement, and number of the first light conversionpatches 210 may be the same as the first light conversion patches 210shown in FIG. 10. For example, the eight first light conversion patches210 may be arranged at an angular interval of approximately 45 degreeswith respect to the virtual central point in the first through hole 121.

Each of the first light conversion patches 210 may be a square havingone side of approximately 1.5 mm.

The light conversion patch 200 may include a plurality of second lightconversion patches 220 arranged around a second through hole 122disposed in a second column in the left and right edges 120 b of thereflective sheet 120.

The size of the second light conversion patches 220 may be less than thesize of the first light conversion patches 210. For example, the secondlight conversion patches 220 may have a square shape including a side ofapproximately 1.3 mm.

The number of the second light conversion patches 220 may be less thanthe number of the first light conversion patches 210, and the pluralityof second light conversion patches 220 may be arranged at approximatelyequal intervals along a circumference of a virtual circle surroundingthe second through hole 122. For example, the four second lightconversion patches 220 may be arranged at an angular interval ofapproximately 90 degrees with respect to the virtual central point inthe second through hole 122.

The light conversion patch 200 may include a plurality of third lightconversion patches 230 arranged around a third through hole 123 disposedin a third column from the left and right edges 120 b of the reflectivesheet 120.

The size of the third light conversion patches 230 may be less than thesize of the second light conversion patches 220. For example, the thirdlight conversion patches 230 may have a square shape including a side ofapproximately 1.1 mm.

The number of the third light conversion patches 230 may be less thanthe number of the second light conversion patches 220, and the pluralityof third light conversion patches 230 may be arranged at approximatelyequal intervals along a circumference of a virtual circle surroundingthe second through hole 122. For example, the three third lightconversion patches 230 may be arranged at an angular interval ofapproximately 90 degrees or approximately 180 degrees with respect tothe virtual central point in the third through hole 123.

Although not shown in FIG. 15, the light conversion patch 200 mayinclude a plurality of fourth light conversion patches, a plurality offifth light conversion patches or a plurality of sixth light conversionpatches. Each of the fourth, fifth, and sixth light conversion patchesmay be formed in a polygon shape including a quadrangle, a triangle, apentagon, or a hexagon.

The size, number, and arrangement of the fourth light conversion patchesmay be the same as the size, number, and arrangement of the first lightconversion patches 210. The size, number, and arrangement of the fifthlight conversion patches may be the same as the size, number, andarrangement of the second light conversion patches 220. The size,number, and arrangement of the sixth light conversion patches may be thesame as the size, number, and arrangement of the fifth light conversionpatches 250.

The light conversion patch 200 may include a plurality of seventh lightconversion patches arranged around a seventh through hole disposed atthe corner portion of the reflective sheet, and the size, number, andarrangement of the seventh light conversion patches may be the same asthe size, number, and arrangement of the first light conversion patches210.

FIG. 16 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 16, a light conversion patch 200 may be arrangedaround a through hole at an edge portion of the reflective sheet 120.

The light conversion patch 200 may include a light conversion materialthat absorbs a portion of blue light among incident light and converts aportion of the absorbed blue light into yellow light, red light, orgreen light. In addition, the light conversion patch 200 may include alight conversion material that absorbs a portion of blue light andreflects yellow light, red light, or green light among incident light.

The light conversion patch 200 may have a shape that approximately formsring surrounding the through holes 120 a. In FIG. 16, the lightconversion patch 200 having a substantially ring shape is illustrated,but is not limited thereto. For example, the light conversion patch 200may be formed in various ring shapes surrounding the through holes, suchas an oval ring, a square ring, a pentagonal ring, and a hexagonal ring.

The light conversion patch 200 may include a plurality of first lightconversion bands 310 arranged around a first through hole 121 disposedin a first column from the left and right edges 120 b of the reflectivesheet 120. For example, the first light conversion bands 310 may beformed in a ring shape having a width of approximately 1.5 mm.

The light conversion patch 200 may include a plurality of second lightconversion bands 320 arranged around a second through hole 122 disposedin a second column from the left and right edges 120 b of the reflectivesheet 120. The shape, size and number of the second light conversionbands 320 may be the same as the shape, size and number of the firstlight conversion bands 310. For example, the second light conversionbands 320 may be formed in a ring shape having a width of approximately1.5 mm.

The light conversion patch 200 may include a plurality of third lightconversion bands 330 arranged around a third through hole 123 disposedin a third column from the left and right edges 120 b of the reflectivesheet 120. The shape, size and number of the third light conversionbands 330 may be the same as the shape, size and number of the firstlight conversion bands 310. For example, the third light conversionbands 330 may be formed in a ring shape having a width of approximately1.5 mm.

Although not shown in FIG. 16, the light conversion patch 200 mayfurther include a plurality of fourth light conversion bands surroundinga fourth through hole, a plurality of fifth light conversion bandssurrounding a fifth through hole, a plurality of sixth light conversionbands surrounding a sixth through hole, or a plurality of seventh lightconversion bands surrounding a seventh through hole.

In addition, unlike that shown in FIG. 16, the second light conversionbands 320 may be omitted, or the third light conversion bands 330 may beomitted, or the second and third light conversion bands 320 and 330 maybe omitted. In other words, the light conversion patch 200 may includeonly the first light conversion bands 310, may include the first andsecond light conversion bands 310 and 320, or may include the first andthird light conversion bands 310 and 330.

During the light is reflected by the light conversion bands arranged atthe edge portion of the reflective sheet 120, the ratio of blue lightcontained in the light may be reduced, and the ratio of yellow light maybe further increased. Further, a defect (e.g., optical defect), in whichthe edge portion of the light source apparatus 100 is more bluish thanthe central portion of the light source apparatus 100 may be eliminated.

FIG. 17 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 17, a light conversion patch 200 including alight conversion material may be arranged around a through hole at anedge portion of the reflective sheet 120.

The light conversion patch 200 may include a plurality of first lightconversion bands 310 arranged around a first through hole 121 disposedin a first column in left and right edges 120 b of the reflective sheet120. For example, the first light conversion bands 310 may be formed ina ring shape having a width of approximately 1.5 mm.

The light conversion patch 200 may include a plurality of second lightconversion bands 320 arranged around a second through hole 122 disposedin a second column in left and right edges 120 b of the reflective sheet120. The size of the second light conversion bands 320 may be less thanthe size of the first light conversion bands 310. For example, thesecond light conversion bands 320 may be formed in a ring shape having awidth of approximately 1.3 mm.

The light conversion patch 200 may include a plurality of third lightconversion bands 330 arranged around a third through hole 123 disposedin a third column in left and right edges 120 b of the reflective sheet120. The size of the third light conversion bands 330 may be less thanthe size of the second light conversion bands 320. For example, thethird light conversion bands 330 may be formed in a ring shape having awidth of approximately 1.1 mm.

As mentioned above, at the left and right edge portions of thereflective sheet 120, the first light conversion bands 310, the secondlight conversion bands 320 and/or the third light conversion bands 330may be arranged. The width of the first light conversion bands 310 maybe greater than the width of the second light conversion bands 320, andthe width of the second light conversion bands 320 may be greater thanthe width of the third light conversion bands 330.

Although not shown in FIG. 17, the light conversion patch 300 mayfurther include a plurality of fourth light conversion bands surroundinga fourth through hole, a plurality of fifth light conversion bandssurrounding a fifth through hole, a plurality of sixth light conversionbands surrounding a sixth through hole, or a plurality of seventh lightconversion bands surrounding a seventh through hole arranged at thecorner of the reflective sheet 120. The fourth light conversion bandsmay be the same as the first light conversion bands 310, the fifth lightconversion bands may be the same as the same as the second lightconversion bands 320, the sixth light conversion bands may be the sameas the third light conversion bands 330, and the seventh lightconversion bands may be the same as the first light conversion bands310.

Accordingly, as the distance from the left and right edges 120 b of thereflective sheet 120 to the light conversion patch 200 is increased, thesize (width) of the light conversion patch 200 may be reduced.

FIG. 18 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 18, a light conversion patch 200 including alight conversion material may be arranged around a through hole 120 a atthe edge portion of the reflective sheet 120.

The light conversion patch 200 may be formed in a substantiallyplurality of circumferential shapes surrounding the through holes 120 a.In FIG. 18, the light conversion patch 200 having a substantiallycircumferential shape is illustrated, but is not limited thereto. Forexample, the light conversion patch 200 may have various circumferentialshapes surrounding through holes, such as an ellipse circumference, asquare circumference, a pentagonal circumference, or a hexagonalcircumference.

The light conversion patch 200 may include first light conversion linessurrounding a first through hole 121 disposed in a first column from theleft and right edges 120 b of the reflective sheet 120. For example, thefirst light conversion lines may include three circumferences 311, 312,and 313 surrounding the first through hole 121.

The light conversion patch 200 may include second light conversion linessurrounding a second through hole 122 disposed in a second column in theleft and right edges 120 b of the reflective sheet 120. The shape, size,and number of the second light conversion lines may be the same as theshape, size, and number of the first light conversion lines. Forexample, the second light conversion lines may include threecircumferences 321, 322, and 323 surrounding the second through hole122.

The light conversion patch 200 may include third light conversion linessurrounding a third through hole 123 disposed in a third column in theleft and right edges 120 b of the reflective sheet 120. The shape, size,and number of the third light conversion lines may be the same as theshape, size, and number of the first light conversion lines. Forexample, the third light conversion lines may include threecircumferences 331, 332, and 333 surrounding the third through hole 123.

Although not shown in FIG. 18, the light conversion patch 200 mayfurther include a plurality of fourth light conversion lines surroundinga fourth through hole, a plurality of fifth light conversion linessurrounding a fifth through hole, a plurality of sixth light conversionlines surrounding a sixth through hole or a plurality of seventh lightconversion lines surrounding a seventh through hole.

Unlike that shown in FIG. 18, the second light conversion lines may beomitted, or the third light conversion lines may be omitted, or thesecond and third light conversion lines may be omitted. In other words,the light conversion patch 200 may include only the first lightconversion lines, or may include the first and second light conversionlines, or may include the first and third light conversion lines.

When the light is reflected by the light conversion lines arranged atthe edge portion of the reflective sheet 120, the ratio of blue lightcontained in the light may be reduced, and the ratio of yellow light maybe further increased. Further, a defect (optical defect), in which theedge portion of the light source apparatus 100 is more bluish than thecentral portion of the light source apparatus 100 may be eliminated.

FIG. 19 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 19, a light conversion patch 200 including alight conversion material may be arranged around a through hole 120 a atthe edge portion of the reflective sheet 120.

The light conversion patch 200 may include first light conversion linessurrounding a first through hole 121 disposed in a first column from theleft and right edges 120 b of the reflective sheet 120. For example, thefirst light conversion lines may include three circumferences 311, 312,and 313 surrounding the first through hole 121.

The light conversion patch 200 may include second light conversion linessurrounding a second through hole 122 disposed in a second column fromthe left and right edges 120 b of the reflective sheet 120. The numberof the second light conversion lines may be less than the number of thefirst light conversion lines. For example, the second light conversionlines may include two circumferences 321 and 322 surrounding the secondthrough hole 122.

The light conversion patch 200 may include third light conversion linessurrounding a third through hole 123 disposed in a third column from theleft and right edges 120 b of the reflective sheet 120. The number ofthe third light conversion lines may be less than the number of thesecond light conversion lines. For example, the third light conversionlines may include a single circumference 331 surrounding the thirdthrough hole 123.

FIG. 20 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 20, a light conversion patch 200 including alight conversion material may be arranged around through holes 120 a atthe edge portion of the reflective sheet 120.

The light conversion patch 200 may include a light conversion region410, in which a light conversion material is dispersed, surrounding thethrough holes 120 a. For example, the light conversion region 410, inwhich points including the light conversion material are distributed,may be arranged around the through holes 120 a.

The light conversion region 410 may be arranged around a first throughhole 121 disposed in a first column at the left and right edges 120 b ofthe reflective sheet 120, around a second through hole 122 disposed in asecond column from the left and right edges 120 b of the reflectivesheet 120, and around a third through hole 123 disposed in a thirdcolumn from the left and right edges 120 b of the reflective sheet 120.

In the light conversion region 410, a density of points including thelight conversion material may be constant.

FIG. 21 is a view of an example of the light conversion patch arrangedon the left and right edge portions of the light source apparatusaccording to an exemplary embodiment of the present disclosure.

As illustrated in FIG. 21, a light conversion patch 200 including alight conversion material may be arranged around through holes 120 a atthe edge portion of the reflective sheet 120.

The light conversion patch 200 may include a light conversion region420, in which a light conversion material is dispersed, surrounding thethrough holes 120 a. For example, the light conversion region 420, inwhich points including the light conversion material are distributed,may be arranged around the through holes 120 a.

The light conversion region 410 may be arranged around a first throughhole 121, a second through hole 122, and a third through hole 123.

In the light conversion region 410, a density of points including thelight conversion material may vary according to a distance from the leftand right edges 120 b of the reflective sheet 120. For example, as thedistance from the left and right edges 120 b of the reflective sheet 120is increased, the density of points including the light conversionmaterial may be reduced.

In the above description, it has been described that the lightconversion patch 200 is applied, printed or coated on the edge portionof the “reflective sheet 120”. However, the light conversion patch 200may be applied, printed or coated on not only the “reflective sheet 120”but also other sheets or plates.

FIG. 22 is a view of an example of the light conversion patch arrangedon the edge portion of the light source apparatus according to anexemplary embodiment of the present disclosure.

For example, a light conversion patch 200 may be applied, printed orcoated on the edge portion of the substrate 112. The light conversionpatch 200 may include a plurality of light conversion patches arrangedat approximately equal intervals along a circumference of a circlesurrounding the light source 111 as shown in FIG. 22.

The light conversion patches surrounding the light source 111 may beexposed through the through hole 120 a of the reflective sheet 120.Accordingly, light emitted from the light source 111 may be reflectedfrom the light conversion patch 200 coated, printed or coated on thesubstrate 112.

The arrangement of the light conversion patch 200 is not limited to FIG.22, and the light conversion patch 200 may be arranged along thecircumference of the light source 111 on the substrate 112 as shown inFIGS. 10 to 21.

In addition, the light conversion patch 200 is not limited to beingarranged on the reflective sheet 120 or the substrate 112, and thus thelight conversion patch 200 may be applied, printed, or coated on theedge portion of the diffuser plate 130, the diffusion sheet 142, theprism sheet 143, the light conversion sheet 141 or the reflectivepolarizing sheet 144.

The display apparatus according to an exemplary embodiment may includethe liquid crystal panel and the light source apparatus configured toirradiate light to the liquid crystal panel. The light source apparatusmay include the plurality of light sources configured to emit bluelight, and the reflective sheet in which a plurality of holes, throughwhich each of the plurality of light sources is passed, is formed. Theplurality of holes may include a first hole disposed at an edge portionof the reflective sheet, and a second hole in which a distance from theedge of the reflective sheet is greater than a distance between the edgeof the reflective sheet and the first hole. The light source apparatusmay further include the plurality of first light conversion patchesarranged along a circumference of a circle surrounding the first hole onthe reflective sheet, and the plurality of second light conversionpatches arranged along a circumference of a circle surrounding thesecond hole on the reflective sheet. The size of each of the pluralityof first light conversion patches may be greater than the size of eachof the plurality of second light conversion patches, and each of theplurality of first and second light conversion patches may include atleast one of a yellow fluorescent material, a yellow dye, or a yellowpigment.

Accordingly, the ratio of blue light contained in the light may bereduced, and the ratio of yellow light may be further increased at theedge portion of the light source apparatus. Further, a difficulty, inwhich the edge portion of the light source apparatus is more bluish thanthe central portion of the light source apparatus, that is, the opticaldefect may be eliminated.

The number of the plurality of first light conversion patchessurrounding any one first hole among the plurality of first holes may begreater than the number of the plurality of second light conversionpatches surrounding any one second hole among the plurality of secondholes. An angular interval between the plurality of first lightconversion patches surrounding any one first hole among the plurality offirst holes may be less than an angular interval between the pluralityof second light conversion patches surrounding any one second hole amongthe plurality of second holes.

Accordingly, at the edge portion of the light source apparatus, theratio of blue light may be reduced in steps and the ratio of yellowlight may be increased in steps. Further, it is possible to maintainuniformity of color between the edge portion of the light sourceapparatus and the central portion of the light source apparatus.

The number of the plurality of first light conversion patchessurrounding any one first hole among the plurality of first holes may beequal to the number of the plurality of second light conversion patchessurrounding any one second hole among the plurality of second holes. Theangular interval between the plurality of first light conversion patchessurrounding any one first hole among the plurality of first holes may beequal to an angular interval between the plurality of second lightconversion patches surrounding any one second hole among the pluralityof second holes.

Accordingly, the defect (e.g., optical defect), in which the edgeportion of the light source apparatus is more bluish than the centralportion of the light source apparatus may be eliminated by using thesimple structure described herein.

The diameter of each of the plurality of light sources may be betweenapproximately 2.0 millimeters (mm) and 3.0 mm.

The diameter of each of the plurality of holes may be betweenapproximately 3.5 mm and 5.5 mm.

The distance between the plurality of holes may be between approximately8.5 mm and 13.5 mm.

Each of the plurality of first light conversion patches may be circularor polygonal, and the dimension (e.g. diameter or length) of each of theplurality of first light conversion patches may be between approximately1.0 mm and 2.0 mm.

The plurality of first light conversion patches may include eight lightconversion patches surrounding any one first hole among the plurality offirst holes.

Each of the plurality of second light conversion patches may be circularor polygonal, and a dimension (e.g. diameter or length) of each of theplurality of second light conversion patches may be betweenapproximately 0.8 mm and 1.5 mm.

The plurality of second light conversion patches may include four lightconversion patches surrounding any one second hole among the pluralityof second holes.

The plurality of holes may include the third hole in which the distancefrom the corner of the reflective sheet is a minimum. The light sourceapparatus may further include the plurality of third light conversionpatches arranged along a circumference of a circle surrounding the thirdhole on the reflective sheet, and the size of each of the plurality ofthird light conversion patches may be greater than the size of each ofthe plurality of second light conversion patches.

Accordingly, at the corner portion of the light source apparatus, theratio of blue light may be reduced and the ratio of yellow light may befurther increased. Further, the defect (e.g., optical defect), in whichthe corner portion of the light source apparatus is more bluish than thecentral portion of the light source apparatus may be eliminated.

Each of the plurality of third light conversion patches may be circularor polygonal, and a dimension (e.g. diameter or length) of each of theplurality of third light conversion patches may be between approximately1.5 mm and 2.5 mm.

The plurality of third light conversion patches may include eight lightconversion patches surrounding any one third hole among the plurality ofthird holes.

The plurality of first light conversion patches may include a pluralityof different first rings surrounding the first hole, and the pluralityof second light conversion patches may include a plurality of differentsecond rings surrounding the first hole. The number of the first ringsmay be greater than the number of the second rings.

The plurality of first light conversion patches may include a first ringsurrounding the first hole and the plurality of second light conversionpatches may include a second ring surrounding the first hole. The widthof the first ring may be greater than the width of the second ring.

The light source apparatus may further include the light conversionsheet provided to convert a portion of the blue light included inincident light into yellow light and provided to transmit anotherportion of the blue light.

Each of the plurality of first light conversion patches may convert aportion of the blue light included in incident light into yellow lightand transmit another portion of the blue light.

Each of the plurality of first light conversion patches may absorb aportion of the blue light included in incident light and reflect theyellow light included in the incident light.

The display apparatus according to an exemplary embodiment may includethe liquid crystal panel, and the light source apparatus configured toirradiate light to the liquid crystal panel. The light source apparatusmay include the plurality of light sources configured to emit blue lightand the reflective sheet in which the plurality of holes, through whicheach of the plurality of light sources is passed, is formed. Theplurality of holes may include a first hole disposed at an edge portionof the reflective sheet, and a second hole farther away from the edge ofthe reflective sheet in comparison with the first hole. The light sourceapparatus may further include the first light conversion patchesarranged around the first hole on the reflective sheet, and the secondlight conversion patches arranged around the second hole on thereflective sheet. An area density of the first light conversion patchesmay be greater than an area density of the second light conversionpatches.

The disclosed embodiments may be embodied in the form of a recordingmedium storing instructions executable by a computer. The instructionsmay be stored in the form of program code and, when executed by aprocessor, may generate a program module to perform the operations ofthe disclosed embodiments. The recording medium may be embodied as acomputer-readable recording medium.

The computer-readable recording medium includes all kinds of recordingmedia in which instructions which can be decoded by a computer arestored. For example, there may be a Read Only Memory (ROM), a RandomAccess Memory (RAM), a magnetic tape, a magnetic disk, a flash memory,and an optical data storage device.

A storage medium readable by machine may be provided in the form of anon-transitory storage medium. Here “non-transitory storage medium”means that the storage medium is a tangible device and does not containa signal (for example, electromagnetic wave), and this term does notdistinguish the case in which data is semi-permanently stored in thestorage medium, from the case in which data is temporarily stored. Forexample, a non-temporary transitory storage medium may include a bufferin which data is temporarily stored.

According to an exemplary embodiment, the method according to variousembodiments disclosed herein may be provided by being included in acomputer program product. Computer program products may be tradedbetween sellers and buyers as commodities. Computer program products maybe distributed in the form of a storage medium (for example, compactdisc read only memory (CD-ROM)), readable by a device. Alternatively,computer program products may be distributed (for example, downloaded oruploaded) online through an application store (for example, Play Store™)or directly distributed between two user devices (for example, smartphones). In the case of online distribution, at least a portion of thecomputer program product (for example, downloadable app) may betemporarily stored or created temporarily in a storage medium readableby a device, such as the manufacturer's server, the application store'sserver, or the relay server's memory.

While the present disclosure has been particularly described withreference to exemplary embodiments, it should be understood by those ofskilled in the art that various changes in form and details may be madewithout departing from the spirit and scope of the present disclosure.

What is claimed is:
 1. A display device comprising: a liquid crystalpanel; a plurality of light sources configured to emit blue light; areflective sheet comprising four edge portions and a center portion,wherein a plurality of holes are disposed on the reflective sheet, theplurality of holes comprises a first hole and a second hole on each ofthe four edge portions of the reflective sheet, each of the four edgeportions comprises an edge of the reflective sheet, the first hole isdisposed at a first distance from the edge of the reflective sheet, andthe second hole is disposed at a second distance from the edge of thereflective sheet, wherein the second distance is greater than the firstdistance; and a plurality of light conversion dots comprising aplurality of first light conversion dots and a plurality of second lightconversion dots, wherein the plurality of first light conversion dotsare disposed around the first hole of the reflective sheet, and theplurality of second light conversion dots are disposed around the secondhole of the reflective sheet, wherein the plurality of holes furthercomprises other holes disposed on the center portion, no lightconversion dot is disposed around each of the other holes, and whereinthe plurality of light conversion dots comprise at least one of afluorescent material, a dye, or a pigment.
 2. The display deviceaccording to claim 1, wherein the plurality of first light conversiondots comprises eight first light conversion dots disposed around thefirst hole, and the plurality of second light conversion dots compriseseight second light conversion dots disposed around the second hole. 3.The display device according to claim 1, wherein the plurality of firstlight conversion dots are arranged at equal angular intervals around thefirst hole, and the plurality of second light conversion dots arearranged at equal angular intervals around the second hole.
 4. Thedisplay device according to claim 1, wherein the plurality of firstlight conversion dots are arranged at intervals on a circumference of afirst virtual circle surrounding the first hole, and the plurality ofsecond light conversion dots are arranged at intervals on acircumference of a second virtual circle surrounding the second hole. 5.The display device according to claim 1, wherein each of the pluralityof first light conversion dots and the plurality of second lightconversion dots is a dot that is circular.
 6. The display deviceaccording to claim 1, wherein a diameter of each of the plurality offirst light conversion dots is equal to or greater than 1.04 mm, and isequal to or less than 1.56 mm, and a diameter of each of the pluralityof second light conversion dots is equal to or greater than 0.88 mm, andis equal to or less than 1.32 mm.
 7. The display device according toclaim 1, wherein each of the plurality of light conversion dots isconfigured to convert the blue light into light of a color differentfrom blue.
 8. The display device according to claim 1, wherein each ofthe plurality of light conversion dots is applied, printed, or coated onthe reflective sheet.
 9. The display device according to claim 1,wherein each of the plurality of light conversion dots comprises atleast one of a yellow fluorescent material, a yellow dye, or a yellowpigment.
 10. The display device according to claim 9, wherein each ofthe plurality of light conversion dots is configured to convert the bluelight into yellow light.
 11. The display device according to claim 1,wherein the plurality of holes further comprises a third hole disposedon each of the four edge portions of the reflective sheet, the thirdhole is disposed at a third distance from the edge of the reflectivesheet, and the third distance is greater than the first distance and thesecond distance, and the plurality of light conversion dots furthercomprises a plurality of third light conversion dots disposed around thethird hole of the reflective sheet.
 12. The display device according toclaim 11, wherein the plurality of third light conversion dots compriseseight third light conversion dots disposed around the third hole. 13.The display device according to claim 11, wherein the plurality of thirdlight conversion dots are arranged at equal angular intervals around thethird hole.
 14. The display device according to claim 11, wherein adiameter of each of the plurality of third light conversion dots isequal to or greater than 0.72 mm and is equal to or less than 1.08 mm.15. The display device according to claim 1, wherein a diameter of thefirst hole and the second hole is equal to or greater than 3.6 mm andequal to or less than 5.4 mm, and a distance between a center of thefirst hole and a center of the second hole is equal to or greater than8.5 mm and equal to or less than 13.5 mm.
 16. The display deviceaccording to claim 1, wherein each of the plurality of light sourcescomprises a light emitting diode disposed on a board in a Chip On Board(COB) method and an optical dome whose vertical cross section being abow shape or a semicircle shape.
 17. The display device according toclaim 16, wherein an intensity of a first light beam which is emittedfrom the light emitting diode in a first direction perpendicular to theboard is less than an intensity of a second light beam which is emittedfrom the light emitting diode in a second direction different from thefirst direction.
 18. The display device according to claim 1, whereinthe plurality of first light conversion dots are closer to the firsthole than all other holes of the plurality of holes, and the pluralityof second light conversion dots are closer to the second hole than allother holes of the plurality of holes.
 19. A light apparatus for adisplay device, the light apparatus comprising: a reflective sheetcomprising four edge portions and a center portion, wherein a pluralityof holes are disposed on the reflective sheet, the plurality of holescomprises a first hole and a second hole on each of the four edgeportions of the reflective sheet, each of the four edge portionscomprises an edge of the reflective sheet, the first hole is disposed ata first distance from the edge of the reflective sheet, and the secondhole is disposed at a second distance from the edge of the reflectivesheet, wherein the second distance is greater than the first distance;and a plurality of light conversion dots comprising a plurality of firstlight conversion dots and a plurality of second light conversion dots,wherein the plurality of first light conversion dots are disposed aroundthe first hole of the reflective sheet, and the plurality of secondlight conversion dots are disposed around the second hole of thereflective sheet, wherein the plurality of holes further comprises otherholes disposed on the center portion, no light conversion dot isdisposed around each of the other holes, and wherein the plurality oflight conversion dots comprise at least one of a fluorescent material, adye, or a pigment.